Convert pnm to dd Online: pnm2dd

You can use Tom's Editor to easily convert images from
Portable aNy Map .PNM to Doodle .DD.
Tom's Editor is a free, online image manipulation and converter program.

Go to Tom's Editor

PNM

PNM images are uncompressed 24 bit RGB images. Can cannot store Alpha channel. PNM images come in 2 types: binary and text. Especially popular on Linux.

DD

Doodle is an image format with extension DD.